Veteran Birmingham boxing trainer Frank O'Sullivan is relishing the prospect of watching the Yafai brothers Khalid and Gamal continue their quest for European Amateur Championship glory on Friday.

Both brothers, from Moseley, have already guaranteed at least bronze medals after a series of superb performances in Moscow and stand just two more wins away from being crowned continental champions.

O'Sullivan has crafted the careers of both Khalid and Gamal at his Birmingham City amateur club - having previously nurtured the young talent of Robert McCracken, who is now performance director for the Great Britain squad.

O'Sullivan said: "I expected both of them to go and get medals but it is great to know they will both be coming back with something. Khalid was always a favourite but Gamal has impressed enormously for his age and experience."

Less than a year ago O'Sullivan was involved in a dispute with the then British amateur boxing hierarchy after Gamal was snubbed for a place in the elite senior squad - leading to fears he could turn professional or even give up boxing completely.

But since the appointment of McCracken things have changed with the 18-year-old finding himself fast-tracked into the full-time podium set-up and seizing his chance to impress with a stunning 7-1 last eight win over Ireland's fancied John Joe Nevin.

O'Sullivan said: "This time last year Gamal was in no-man's land. He was contemplating going pro or turning it in. He felt let down by the set-up. Now he's been proved right and the new set-up deserves credit for giving him the chance.

"The brothers are very different. Khalid has always been very dedicated from the word go. Whatever you tell him he tries to do, and he is very respectful and responsive.

"Gamal has been more of a wild horse, but in the last eight months he has grown from a mischievous schoolboy into a man. His problem was he always thought he was better than he was.

"But now Gamal is starting to listen and grasp what we are trying to tell him. He is learning more and he is improving as a result. He believes in himself, and this is going to give him all the confidence in the world."

Khalid and Gamal are two of five British boxers aiming for final places in Moscow tomorrow. The guaranteed five medals is the best haul from a European Championships since 1961 - when the Britons brought home a total of two golds and three bronzes.

Khalid seeks revenge against German Ronny Beblik, who controversially denied him a World Championship medal in Milan last year, while Gamal has another tough one against home favourite Eduard Abzalimov.

Andrew Selby fights Ukraine's Georgi Chigaev in the other semi-final, Tom Stalker meets another German, Eugen Burhard, at lightweight, while Iain Weaver faces one of five Irishmen left in the competition, Tyrone McCullagh.

Ireland's Olympic medallists Paddy Barnes and Ken Egan, along with Eric Donovan and Darren O'Neill, have all also guaranteed at least bronze and will be fighting for a place in their respective finals.